Pipe-wrench.



No. 650,974. Patented lune 5, i900. A. F. JACKSON.

PIPE WRENCH.

(Application filed Sept. 28, 1899.)

(No Model.)

19L t-wewe;- Qwowwb UNITED STATES PATENT Fries.

AMBROSE F. JACKSON, OF ROCK ISLAND, ILLINOIS.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 650,974, dated June 5, 1900.

Application filed September 28, 1899. Serial No. 731,953. (No model.)

To to whom it may concern.-

Be it known that I, AMBROSE F. J AOKSON, a citizen of the United States, residing at Rock Island, in the county of Rock Island and State of Illinois, have invented a new and useful Pipe-Wrench, of which the following is a specification.

This invention relates to wrenches of the class employed in connection with round or irregular objects, such as rods, pipes, &c.; and one object of the invention is to provide a wrench which will automatically release and renew its grip upon the object being operated upon and to provide in connection therewith a spring arranged in such manner as to exert a pressure on one of the jaws in a direction which will have the effect of urging the jaws toward each other, whereby a proper operative engagement is maintained between the jaws and the pipe or other object.

It is also an object of the present invention to so construct one of the jaws as to provide a bearing-face for the pipe in addition to the ordinary toothed engaging face, whereby the pipe is braced simultaneously with the gripping action for the purpose of preventing the pipe from being crushed or mashed when the jaws are compressed thereon.

Other objects and advantages of the invention will appear in the course of the ensuing description.

The invention consists in a wrench embodying certain novel features and' details of construction and arrangement of parts, as hereinafter fully described, illustrated in the drawings, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of a wrench constructed in accordance with the presentinvention. Fig. 2' is a side elevation of the same, omitting a portion of the handle and showing the jaws in engagement with a pipe of considerable size. Fig. 3 is a similar view with one of the links removed and showing the jaws in engagement with a smaller pipe. Fig. 1 is a detail bottom plan view showing the means for.

provided at its end with a lateral and somewhat-oblique extension 2, which is provided with a slot 3, in which is received the shank 4 of the stationary jaw 5, the shank being held in place by means of a pin 6, extending transversely through the extension 2 and also through the shank of the jaw. The outer engaging face of the jaw 5 is preferably of segmental forrn or rounded and provided with gripping-teeth 7.

The pivoted jaw 8 is substantially L-shaped or comprises two arms or portions 9 and 1 0, which are'substantially at right angles to each other. The arm 10 is provided with a toothed engaging face 11, preferably formed in the exposed face of a separate piece of metal 12, of tool-steel, set into a corresponding recess formed in the pivoted jaw. The inner face of the other arm or portion 9 of the pivoted jawis left plain or smooth, as shown at 13, and is intended to form a rest or bearing for the pipe 14 when engaged at substantially diametrically-opposite points by the teeth 7 and 12 in order to prevent the wrench-jaws from crushing the pipe.

The pivoted jaw S is connected to the stock or handle 1 by means of parallel links 15, connected at one end by a pivot 16, which passes therethrough andthrough the handle 1, and connected at their opposite ends to the pivoted jaw by means of a pivot 17, passing therethrough and through the pivoted jaw. The stationary and movablejaws are thus capable of movement independent of each other and of the links which connect them, and the stationary and movable jaws are geared together by means of intermeshing teeth- 18, formed on and projecting from extensions 19 of the handle 1 and pivoted jaw 8, respectively. By means of this geared connection when the handle 1 is vibrated and forces the stationary jaw against the pipe the teeth of the movable jaw are moved in the opposite direction and caused to bite against the pipe at the opposite side, while the plain engaging face 13 of the movable jaw rests and slides upon the pipe.

The links 15 are provided at their corresponding extremities with cars 20, which extend laterally beyond the stock or handle 1 and which are connected by a bearing-pin 21, which rides in contact with and moves 1ongitudinally of and in engagement with the inner convex surface of a bow-spring 22,which is secured at its fixed end to the handle 1 by means of a loop or band 23, passing tightly around the handle. The free portion of the spring 22 rests in contact with the bearingpin 20 and serves to rock the opposite ends of the links outward,whereby a tendencyis produced for the stationary and movable jaws to move toward each other and close upon the pipe. It will be seen that the ears 20 project sufliciently beyond the pin 21 to form guards or flanges 2t, which straddle the spring 22 and-protect said spring and prevent it from becoming bent or twisted and displaced.

From the foregoing description it will be seen that I have provided'an efiicient pipewrench which may be used upon pipes of varying sizes and that in the vibration of the handle of the wrench the jaws will automatically release and obtain a fresh hold upon the pipe, requiring no attention on the part of the operator. It will also be seen that one of the jaws has a plain engaging face which rests in contact with the pipe and forms an abutment against which the pipe is braced at the same time that it is gripped and operated upon by the toothed portions of the jaws. It will also be seen that the jaws are normally urged toward each other by the spring, the operation of which is certain.

From the foregoing it is thought that the construction, operation, and many advantages of the herein described pipe wrench will be readilyapparent to those skilled in the art without further description, and it will be understood that various changes in the form, proportion, and minor details of construetion may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is

l. A wrench comprising a shank carrying a stationary jaw having a toothed convex face, a movable jaw having two angularlydisposed straight faces,one of which is toothed and the other plain, and links pivotally connected to both jaws, substantially as specitied.

2. A wrench comprising a handle, a stationary jaw thereon, a movable jaw, links pivotally connected to the stationary and movable jaws, and intermeshing teeth on said jaws, substantially as and for the purpose specified.

3. A wrench comprising a handle, a stationary jaw thereon, a movable jaw, parallel links pivotally connected to said jaws, and a spring connected to the handle and bearing against said links, substantially as and for the purpose specified.

t. A wrench comprising a handle, a stationary jaw thereon, a movable jaw, parallel links pivotally connected to said jaws, intermeshing teeth on the jaws, parallel ears on the links, a bearing-pin connecting said ears, and a spring secured at one end to the handle and operating against said pin, substantially as specified.

5. A wrench comprising a handle, a stationary jaw thereon, a movable jaw geared to the stationary jaw, parallel links pivotally connected to the jaws, ears on the links, a bearing-pin connecting said ears, and a spring secured to the handle and having its free end arranged between the said ears to press against the bearing-pin, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

AMBROSE F. JACKSON.

Witnesses:

ORTON INGERSOLL, \VM. TURNER. 

